diff --git a/.github/workflows/ci-pcf-sig-reference.yml b/.github/workflows/ci-pcf-sig-reference.yml
new file mode 100644
index 0000000..aa82027
--- /dev/null
+++ b/.github/workflows/ci-pcf-sig-reference.yml
@@ -0,0 +1,104 @@
+name: CI / Rust (PCF-SIG Reference)
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+env:
+  CARGO_TERM_COLOR: always
+  RUSTFLAGS: "-D warnings"
+
+defaults:
+  run:
+    working-directory: reference/PCF-SIG-v1.0
+
+jobs:
+  fmt:
+    name: rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+      - run: cargo fmt --all -- --check
+
+  clippy:
+    name: clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: reference/PCF-SIG-v1.0
+      - run: cargo clippy --all-targets --all-features -- -D warnings
+
+  test:
+    name: test (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: reference/PCF-SIG-v1.0
+      - run: cargo build --verbose
+      - run: cargo test --all-targets --verbose
+      - run: cargo test --doc --verbose
+
+  test-vector:
+    name: regenerate spec test vector
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: reference/PCF-SIG-v1.0
+      - name: Build and run the test-vector example
+        run: cargo run --example gen_testvector -- pcfsig_testvector.bin
+      - name: Inspect generated test vector
+        run: |
+          ls -l pcfsig_testvector.bin
+          test "$(wc -c < pcfsig_testvector.bin)" = "966"
+      - uses: actions/upload-artifact@v4
+        with:
+          name: pcf-sig-testvector
+          path: reference/PCF-SIG-v1.0/pcfsig_testvector.bin
+
+  coverage:
+    name: code coverage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: llvm-tools-preview
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: reference/PCF-SIG-v1.0
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
+      - name: Generate coverage report (lcov)
+        run: cargo llvm-cov --all-features --package pcf-sig --lcov --output-path lcov.info
+      - name: Print coverage summary
+        run: cargo llvm-cov report
+      - name: Enforce minimum library coverage
+        run: |
+          cargo llvm-cov report --summary-only \
+            --ignore-filename-regex 'bin/|examples/|error\.rs' \
+            --fail-under-lines 90 \
+            --fail-under-functions 90
+      - uses: actions/upload-artifact@v4
+        with:
+          name: pcf-sig-coverage-lcov
+          path: reference/PCF-SIG-v1.0/lcov.info